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Old 04-26-2015, 06:38 PM   #1
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Yamaha generator - overheating?

I run 2 Yamaha 2000 generators. This pass week the generators keep overloading. I turned everything off but the A/C. The generators would run fine for an hour or 2 before overloading again. In reading the manual, the overload light could also indicate overheating. This seems more likely.

Thoughts?

What can I do to avoid overheating.

Thanks!

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Old 04-26-2015, 06:52 PM   #2
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Are you running more than one A/C unit? It COULD be that you are running too large of a load. Those units aren't meant to run at max output for extended periods. Ie., they are 2000w units, but extended rated output is only 1600 (if I remember correctly). I forget what the surge output and duration is now... but I know max is 2000w, rated output is 1600w, and in parallel you're limited to 3600w.
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Old 04-26-2015, 06:55 PM   #3
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One unit. It runs for a while and then cuts off, but no when it kicks on, just randomly stops. I turn off the A/C. Turn off the generators. Restart the generators. Turn A/C back on and then I'm good for anywhere from 30 minutes to several hours.
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Old 04-26-2015, 06:59 PM   #4
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I don't think you can run two a/c units especially in hot weather.
Your pulling down 3600 watts alone with just the a/c units.
Converter is also drawning another 600 to 900 watts.
One a/c at a time.

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Old 04-26-2015, 07:10 PM   #5
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did you check the oil level in the generator?
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Old 04-26-2015, 07:57 PM   #6
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Had a similar problem last weekend where my honda 2000 would randomly shut off but restart no problem. Took a while to notice the oil shutdown light. Oil seemed pretty full but added a bit more and got thru the weekend without any more issues.
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Old 04-27-2015, 12:33 PM   #7
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Check the manual for oil specifications. In hot weather or running near capacity, there is usually a secondary oil viscosity specification.

Provide shade for the generators when they are operating.
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Old 04-27-2015, 12:53 PM   #8
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Thanks. I changed the oil after this weekend.

One more thought, what should I do with my battery when my generators are connected? I am leaving the battery's connected so that is pulling from my generator too.
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Old 04-27-2015, 01:12 PM   #9
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I would be interested in knowing how many Btu AC you are running. 13,500Btu shouldn't be a problem for the two gensets. BUT, what else are you running at the same time on the generator? Do you have a plug in voltmeter that stays in one of your TT outlets at all times? If,not, suggest you spring for one. Charging a battery at the same time through the converter shouldn't be a issue. Running refrigerator and a bunch of non led lights might get you overloaded though. The voltmeter will tell you whats happening. If you can't pull 110vac whilst your load is on the generator, you got a problem with too much stuff on
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Old 04-27-2015, 01:22 PM   #10
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I would be interested in knowing how many Btu AC you are running. 13,500Btu shouldn't be a problem for the two gensets. BUT, what else are you running at the same time on the generator? Do you have a plug in voltmeter that stays in one of your TT outlets at all times? If,not, suggest you spring for one. Charging a battery at the same time through the converter shouldn't be a issue. Running refrigerator and a bunch of non led lights might get you overloaded though. The voltmeter will tell you whats happening. If you can't pull 110vac whilst your load is on the generator, you got a problem with too much stuff on
I agree here is a chart of amps things pull then figure out what you can run without overloads.
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Old 04-27-2015, 01:24 PM   #11
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Correct me if I'm wrong but 2
A/c units and converter alone max out the two gennies?

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Old 04-27-2015, 01:24 PM   #12
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13.5 a/c. It was night, so no lights were on, I even switched the frig to propane and it was still overloading.

I will get a volt meter and monitor that.
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Old 04-27-2015, 06:06 PM   #13
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Should I be more worried about Volts or Amps?
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Old 04-27-2015, 06:18 PM   #14
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tmas, do both generators quit? I am wondering if the parallel setup has an issue? Does one generator speed up at all, like a fuel supply issue. This could cause the load to be transferred to one generator causing it to stop. Are you running premium fuel with stabilizer as well.

In order to test the current you need a breakout and a clamp on ammeter, something best left for a electrician.
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Old 04-27-2015, 08:20 PM   #15
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tmas, do both generators quit? I am wondering if the parallel setup has an issue? Does one generator speed up at all, like a fuel supply issue. This could cause the load to be transferred to one generator causing it to stop. Are you running premium fuel with stabilizer as well.

In order to test the current you need a breakout and a clamp on ammeter, something best left for a electrician.
It would vary, sometime both would overload, other times one of them would not be running.


Both were filled with regular gas (87 octane).

After this weekend I ran stabil through both generators and changed the oil.
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Old 04-27-2015, 08:41 PM   #16
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It would vary, sometime both would overload, other times one of them would not be running.


Both were filled with regular gas (87 octane).

After this weekend I ran stabil through both generators and changed the oil.
I agree with B&B there must be a problem with your connection.
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Old 04-27-2015, 09:35 PM   #17
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I agree with B&B there must be a problem with your connection.
Other than gas, what can I check on my generators or dual power cable?

Thanks again for all the help.
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Old 04-27-2015, 10:03 PM   #18
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Maybe your parallel kit is not working correctly. Check the small pins on the plugs for arcing and make sure they are not black or look like welding has happened, might be brass in color with the nickel plate worn off.
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Old 04-28-2015, 12:54 PM   #19
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I will look at my candles tonight. When connecting the banana plugs, do they lock in place?
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